Cm. Zhang et Xy. Lu, A CONVENIENT SYNTHESIS OF 3-IODOHOMOALLYLIC ALCOHOLS AND THE FURTHER TRANSFORMATION TO ALPHA,BETA-UNSATURATED GAMMA-LACTONES, Tetrahedron letters, 38(27), 1997, pp. 4831-4834
The tandem nucleophilic addition-aldol reaction of 3,4-pentadien-2-one
, iodide ion, and aldehydes in the presence of ZrCl4 as the catalyst g
ave the 3-iodohomoallylic alcohols in good yields, which could be furt
her transformed to alpha,beta-unsaturated gamma-lactones by palladium-
catalysed cyclocarbonylation. (C) 1997 Elsevier Science Ltd.